SOUTH African Defense Minister Patrick Lekota arrived in the Qatari capital, Doha, on Friday for a two-day official visit. Qatar and South Africa signed an accord on air links in June. Last year, the South African company Sasol agreed to work with the state-owned Qatar General Petroleum Corporation and Phillips Petroleum of the United States to build a factory in Qatar to convert natural gas into liquid petroleum products. The project’s price tag was $500-million.